The owner illegally decorated the property by drilling holes at the beam-column connection.

The property management company has the right to order the owner to stop the decoration.

According to Article 5 and Article 13 of the Administrative Measures for Interior Decoration of Residential Buildings (OrderNo.10 of the Ministry of Construction of People's Republic of China (PRC)), the owner must declare and register with the property before the decoration, and it is strictly forbidden to start work or change the load-bearing structures such as beams, columns, load-bearing walls, roof trusses and suspension cables without permission. Property management companies have the right to order owners to stop renovation, timely rectification, and report to the relevant departments.

It may be illegal for the owner to drill holes in the beam privately, so he should immediately stop work for rectification and report the situation to the housing management department or the Housing and Construction Bureau in his area.